There is no KB40112215. KB4012215 is the Monthly Rollup from March 2017, which has been replaced by KB4015549 (April) and KB4019264 (May). So there's no need to add this update to your machine or WSUS Offline.

And BTW, KB4012212 is the Security-Only package for Win7 and Server 2008 R2, not Server 2008.

Both options provide downloads to later do the same job regarding security-related updates. The difference is that the quality rollup includes some additional updates and is one package (incl. telemetric stuff that may not be desired).